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<head>
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    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div {
            border-top: 1px #ccc solid;
            border-bottom: 1px #ccc solid;
        }

        div ul {
            margin: 0;
            padding: 0;
            list-style: none;
            width: 1210px;
            height: 40px;
            margin: auto;
        }

        div ul li {
            width: 240px;
            height: 40px;
            text-align: center;
            line-height: 40px;
            float: left;
            border-right: 1px #ccc solid;
        }

        div ul li:last-child {
            border-right: 0;
        }

        div ul li a {
            text-decoration: none;
            display: block;
        }

        div ul li:nth-child(4) {
            position: relative;
        }

        div ul li:nth-child(4) img {
            position: absolute;
            left: 50%;
            top: 42px;
            transform: translateX(-50%);
            display: none;

        }

        div ul li:nth-child(4):hover img {

            display: block;
        }
    </style>
</head>

<body>
    <div>
        <ul>
            <li>
                <a href="">我要投资</a>
            </li>
            <li>
                <a href="">平台介绍</a>
            </li>
            <li>
                <a href="">新手专区</a>
            </li>
            <li>
                <a href="">手机微金服</a>
                <img src="./images/code.jpg" alt="">
            </li>
            <li>
                <a href="">个人中心</a>
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        </ul>
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    <div style="height: 400px;background: red;"></div>
</body>

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